From: Alex Williamson <alex.williamson@hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: Problem using more than 2 GB with my driver
Date: Tue, 30 Sep 2003 18:06:46 +0000 [thread overview]
Message-ID: <marc-linux-ia64-106494522210942@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-106494885715850@msgid-missing>
On Tue, 2003-09-30 at 11:49, Grant Grundler wrote:
> On Tue, Sep 30, 2003 at 04:13:30PM +0200, Patrice Martinez wrote:
> > I wrote a driver using the physical addresses of a buffer computed by
> > the "ia64_tpa" function (but no using DMA) that works only on machines
> > with 2Gb of RAM at most. With more RAM, the machine crashes very badly
> > after a while, and even KDB is not usable...
> > If anybody has an a idea ;-)
>
> Which machine is this on?
> rx2600/rx5670 has a memory hole from 2-4GB because of IO "stuff".
> ie memory > 2G ends up getting placed above 4GB physical.
>
Minor correction, on zx1, memory in the 1-4GB range is relocated. So
there's actually only 1GB of memory below 4GB.
Alex
--
Alex Williamson HP Linux & Open Source Lab
next prev parent reply other threads:[~2003-09-30 18:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-30 14:13 Problem using more than 2 GB with my driver Patrice Martinez
2003-09-30 15:45 ` Luck, Tony
2003-09-30 17:49 ` Grant Grundler
2003-09-30 18:06 ` Alex Williamson [this message]
2003-10-01 11:05 ` Patrice Martinez
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